1. Fetal & Neonatal Cardiology Program, Division of Cardiology, Department of Pediatrics, Stollery Children's Hospital and Royal Alexandra Hospital, Women & Children's Health Research and Cardiovascular Research Centre; University of Alberta; Edmonton Alberta Canada
2. Division of Cardiology, Department of Pediatrics; University of Calgary, Alberta Children's Hospital; Calgary Alberta Canada
3. School of Public Health; University of Alberta; Edmonton Alberta Canada
4. Department of Obstetrics and Gynecology; University of Alberta, Edmonton; Alberta Canada